John Spurlock1. not sure yet - it's a passion project and still very early days (e.g. it does jsonld validation under the hood but not exposed in the UI yet)
2. yes (try a federated threads profile or post url, or gotosocial)
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.